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PHP Manual

Variable handling Functions
PHP Manual

is_int

(PHP 4, PHP 5)

is_int — Find whether the type of a variable is integer

Description

bool is_int ( mixed $var )

Finds whether the type of the given variable is integer.

Note:

To test if a variable is a number or a numeric string (such as form input, which is always a string), you must use is_numeric().

Parameters

var

The variable being evaluated.

Return Values

Returns TRUE if var is an integer, FALSE otherwise.

Examples

Example #1 is_int() example

<?php
if (is_int(23)) {
    echo "is integer\n";
} else {
    echo "is not an integer\n";
}
var_dump(is_int(23));
var_dump(is_int("23"));
var_dump(is_int(23.5));
var_dump(is_int(true));
?>

The above example will output:

is integer
bool(true)
bool(false)
bool(false)
bool(false)

See Also

  • is_bool() - Finds out whether a variable is a boolean
  • is_float() - Finds whether the type of a variable is float
  • is_numeric() - Finds whether a variable is a number or a numeric string
  • is_string() - Find whether the type of a variable is string
  • is_array() - Finds whether a variable is an array
  • is_object() - Finds whether a variable is an object

Variable handling Functions
PHP Manual


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PHP-Index
  1. Introduction
  2. Installation and Configuration
  3. Language reference
  4. Security
  5. Features
  6. Function reference
  7. PHP and zend engine internal
  8. FAQ: Frequently Asked Questions
  9. Appendices



 

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